Pregnant women should avoid cleaning cat litter due to the risk of contracting toxoplasmosis, a disease caused by the parasite toxoplasma gondii. This parasite is commonly found in cat feces and can be harmful to the fetus if contracted during pregnancy. Toxoplasmosis can lead to serious complications such as miscarriage, stillbirth, or health issues in the baby. It is recommended that pregnant women have someone else clean the cat litter box, or wear gloves and wash hands thoroughly after cleaning it themselves.

Taking precautions such as having indoor cats, feeding them only commercial cat food, and avoiding contact with stray cats can also help reduce the risk of exposure to toxoplasmosis. It is important for pregnant women to be aware of this potential risk and take necessary steps to protect themselves and their unborn child from this harmful parasite.